1、七年级英语下册Unit4祈使句讲解和练习一、讲解1.定义：祈使句是用来表示请求、命令、建议等语气的句子,通常说话的对象是第二人称you,you常被省略。 2.肯定祈使句do型:动词原形+其他.(please让语气更委婉)【例】Sit down please.请坐下。 be型:Be动词+形容词/名词(+其他)、【例】Be polite to the old.请对老人有礼貌。let型:Let+宾语+动词原形+其他、【例】Letme help you.让我来帮助你。 其他:No+v.-ing/名词.(表示“禁止”)【例】No smoking!禁止吸烟!Nophotos!禁止拍照!3.否定祈使句do型
2、和be型否定形式:Dont+动词原形+其他。【例】Dont be late for class.上课不要迟到。 Dont listen to music in class.上课不要听音乐。let型否定形式 Dont +let+宾语+动词原形+其他，【例】Dont let him do this.不要让他做这个。 Let+宾语+not+动词原形+其他。【例】Let himnot go out.不要让他出去。二、练习一、用括号内所给单词的适当形式填空。1.Lets_(do) the homework now.2.Everyone，_(enjoy) your campus life in our s
3、chool.3._(walk) quickly, or you will be late for school.4._(not run) in the classroom.5.Lucy,_( come) in and close the door.二、根据汉语意思完成句子,每空一词。6.今天天气很好。我们去乡下野餐吧。It is fine today.Lets_ _ _ in the countryside.7.杰克,别在这儿玩。你妹妹刚才睡着了。Jack,_ _ _here.Your sister fell asleep just now.8.继续练习,你的英语会说得更好。_ _,and y
4、ou will be much better at speaking English.WY9.我的老师说:“别玩电脑了。该上课了。”“_ _on the computer.Its time for class,” says my teacher.10.看那个标志。上面写着:“请勿触摸!”Look at the sign.It says,“_ _ _!” 三、按要求完成句子,每空一词。11.No eating in the library.(改为同义句)_ _in the library.12.Let them go to the science lab.(改为否定句)Let them_ _to
5、 the science lab.13.Go down Zhongshan East Road.(改为否定句)_ _down Zhongshan East Road.14.You mustnt take photos.(改为祈使句)_ _ _.= _ _15.You should go to bed early tonight.(改为祈使句)_ _ _ _tonight.【答案】一、1.do 6 2.enjoy3.Walk 24.Dont run e二、6.have a picnic 7.dont play around 8.Keeppractising 9.Dont play10.No touching三、11.Dont eat 12.not go 13.Dont go14.Dont takephotos;No photos15.Go to bed early2
